CODEWITHSUNDEEP
c#
gentlerainsky
gentlerainsky

Reputation: 256

How to use methods of 'DateTime' object from parameters that is declared type as 'object'

I want to use object type as a parameter in order to get value from various type (int,string,datetime,etc) and return the string representation of the object.

But I have a problem with DateTime. I know that object is a parent class of DateTime so there won't have any method of it child class.

So is there any way to copy some value from object and instantiate a new DateTime object or there is any other method.

    public static string getStringOfValue(object value)
    {
        // all of this List is used for type checking //////////////
        List<object> _number_type_list = new List<object>()
        {
            typeof(byte), typeof(sbyte), typeof(int), typeof(long),
            typeof(short), typeof(ushort), typeof(uint), typeof(ulong),
            typeof(float), typeof(float), typeof(decimal)
        };
        List<object> _string_type_list = new List<object>()
        {
            typeof(char),typeof(string)
        };
        List<object> _boolean_type_list = new List<object>()
        {
            typeof(bool)
        };
        //////////////////////////////////////////////////

        // used for format string of DateTime
        string SQL_DATETIME_FORMAT = "YYYYMMdd hhmmss.fff";


        var value_type = value.GetType();
        var value_string = "";

        if (_number_type_list.Contains(value_type) || _boolean_type_list.Contains(value_type))
        {
            value_string = value.ToString();
        }

        else if (_string_type_list.Contains(value_type))
        {
            value_string = "'" + value + "'";
        }

        else if (value.GetType() == typeof(System.DateTime))
        {
            //// how can I use format string method of DateTime ////
            value_string = value.ToString();
            // value_string = value.ToString(SQL_DATETIME_FORMAT);
            ////////////////////////////////////////////////////////
        }

        return value_string;
    }

Upvotes: 1

Views: 83

Answers (1)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 726709

how can I use format string method of DateTime

Cast your value to DateTime before making the call:

value_string = ((DateTime)value).ToString(SQL_DATETIME_FORMAT);

Upvotes: 1

Related Questions